root / src / Ganeti / HTools / Types.hs @ 34ad1d7c
History | View | Annotate | Download (15.1 kB)
1 |
{-# LANGUAGE TemplateHaskell #-} |
---|---|
2 |
|
3 |
{-| Some common types. |
4 |
|
5 |
-} |
6 |
|
7 |
{- |
8 |
|
9 |
Copyright (C) 2009, 2010, 2011, 2012, 2013 Google Inc. |
10 |
|
11 |
This program is free software; you can redistribute it and/or modify |
12 |
it under the terms of the GNU General Public License as published by |
13 |
the Free Software Foundation; either version 2 of the License, or |
14 |
(at your option) any later version. |
15 |
|
16 |
This program is distributed in the hope that it will be useful, but |
17 |
WITHOUT ANY WARRANTY; without even the implied warranty of |
18 |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
19 |
General Public License for more details. |
20 |
|
21 |
You should have received a copy of the GNU General Public License |
22 |
along with this program; if not, write to the Free Software |
23 |
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
24 |
02110-1301, USA. |
25 |
|
26 |
-} |
27 |
|
28 |
module Ganeti.HTools.Types |
29 |
( Idx |
30 |
, Ndx |
31 |
, Gdx |
32 |
, NameAssoc |
33 |
, Score |
34 |
, Weight |
35 |
, GroupID |
36 |
, defaultGroupID |
37 |
, AllocPolicy(..) |
38 |
, allocPolicyFromRaw |
39 |
, allocPolicyToRaw |
40 |
, NetworkID |
41 |
, InstanceStatus(..) |
42 |
, instanceStatusFromRaw |
43 |
, instanceStatusToRaw |
44 |
, RSpec(..) |
45 |
, AllocInfo(..) |
46 |
, AllocStats |
47 |
, DynUtil(..) |
48 |
, zeroUtil |
49 |
, baseUtil |
50 |
, addUtil |
51 |
, subUtil |
52 |
, defReservedDiskRatio |
53 |
, unitMem |
54 |
, unitCpu |
55 |
, unitDsk |
56 |
, unitSpindle |
57 |
, unknownField |
58 |
, Placement |
59 |
, IMove(..) |
60 |
, DiskTemplate(..) |
61 |
, diskTemplateToRaw |
62 |
, diskTemplateFromRaw |
63 |
, MirrorType(..) |
64 |
, templateMirrorType |
65 |
, MoveJob |
66 |
, JobSet |
67 |
, Element(..) |
68 |
, FailMode(..) |
69 |
, FailStats |
70 |
, OpResult |
71 |
, opToResult |
72 |
, EvacMode(..) |
73 |
, ISpec(..) |
74 |
, MinMaxISpecs(..) |
75 |
, IPolicy(..) |
76 |
, defIPolicy |
77 |
, rspecFromISpec |
78 |
, AutoRepairType(..) |
79 |
, autoRepairTypeToRaw |
80 |
, autoRepairTypeFromRaw |
81 |
, AutoRepairResult(..) |
82 |
, autoRepairResultToRaw |
83 |
, autoRepairResultFromRaw |
84 |
, AutoRepairPolicy(..) |
85 |
, AutoRepairSuspendTime(..) |
86 |
, AutoRepairData(..) |
87 |
, AutoRepairStatus(..) |
88 |
) where |
89 |
|
90 |
import qualified Data.Map as M |
91 |
import System.Time (ClockTime) |
92 |
|
93 |
import qualified Ganeti.Constants as C |
94 |
import qualified Ganeti.THH as THH |
95 |
import Ganeti.BasicTypes |
96 |
import Ganeti.Types |
97 |
|
98 |
-- | The instance index type. |
99 |
type Idx = Int |
100 |
|
101 |
-- | The node index type. |
102 |
type Ndx = Int |
103 |
|
104 |
-- | The group index type. |
105 |
type Gdx = Int |
106 |
|
107 |
-- | The type used to hold name-to-idx mappings. |
108 |
type NameAssoc = M.Map String Int |
109 |
|
110 |
-- | A separate name for the cluster score type. |
111 |
type Score = Double |
112 |
|
113 |
-- | A separate name for a weight metric. |
114 |
type Weight = Double |
115 |
|
116 |
-- | The Group UUID type. |
117 |
type GroupID = String |
118 |
|
119 |
-- | Default group UUID (just a string, not a real UUID). |
120 |
defaultGroupID :: GroupID |
121 |
defaultGroupID = "00000000-0000-0000-0000-000000000000" |
122 |
|
123 |
-- | Mirroring type. |
124 |
data MirrorType = MirrorNone -- ^ No mirroring/movability |
125 |
| MirrorInternal -- ^ DRBD-type mirroring |
126 |
| MirrorExternal -- ^ Shared-storage type mirroring |
127 |
deriving (Eq, Show) |
128 |
|
129 |
-- | Correspondence between disk template and mirror type. |
130 |
templateMirrorType :: DiskTemplate -> MirrorType |
131 |
templateMirrorType DTDiskless = MirrorExternal |
132 |
templateMirrorType DTFile = MirrorNone |
133 |
templateMirrorType DTSharedFile = MirrorExternal |
134 |
templateMirrorType DTPlain = MirrorNone |
135 |
templateMirrorType DTBlock = MirrorExternal |
136 |
templateMirrorType DTDrbd8 = MirrorInternal |
137 |
templateMirrorType DTRbd = MirrorExternal |
138 |
templateMirrorType DTExt = MirrorExternal |
139 |
|
140 |
-- | The resource spec type. |
141 |
data RSpec = RSpec |
142 |
{ rspecCpu :: Int -- ^ Requested VCPUs |
143 |
, rspecMem :: Int -- ^ Requested memory |
144 |
, rspecDsk :: Int -- ^ Requested disk |
145 |
, rspecSpn :: Int -- ^ Requested spindles |
146 |
} deriving (Show, Eq) |
147 |
|
148 |
-- | Allocation stats type. This is used instead of 'RSpec' (which was |
149 |
-- used at first), because we need to track more stats. The actual |
150 |
-- data can refer either to allocated, or available, etc. values |
151 |
-- depending on the context. See also |
152 |
-- 'Cluster.computeAllocationDelta'. |
153 |
data AllocInfo = AllocInfo |
154 |
{ allocInfoVCpus :: Int -- ^ VCPUs |
155 |
, allocInfoNCpus :: Double -- ^ Normalised CPUs |
156 |
, allocInfoMem :: Int -- ^ Memory |
157 |
, allocInfoDisk :: Int -- ^ Disk |
158 |
, allocInfoSpn :: Int -- ^ Spindles |
159 |
} deriving (Show, Eq) |
160 |
|
161 |
-- | Currently used, possibly to allocate, unallocable. |
162 |
type AllocStats = (AllocInfo, AllocInfo, AllocInfo) |
163 |
|
164 |
-- | The network UUID type. |
165 |
type NetworkID = String |
166 |
|
167 |
-- | Instance specification type. |
168 |
$(THH.buildObject "ISpec" "iSpec" |
169 |
[ THH.renameField "MemorySize" $ THH.simpleField C.ispecMemSize [t| Int |] |
170 |
, THH.renameField "CpuCount" $ THH.simpleField C.ispecCpuCount [t| Int |] |
171 |
, THH.renameField "DiskSize" $ THH.simpleField C.ispecDiskSize [t| Int |] |
172 |
, THH.renameField "DiskCount" $ THH.simpleField C.ispecDiskCount [t| Int |] |
173 |
, THH.renameField "NicCount" $ THH.simpleField C.ispecNicCount [t| Int |] |
174 |
, THH.renameField "SpindleUse" $ THH.simpleField C.ispecSpindleUse [t| Int |] |
175 |
]) |
176 |
|
177 |
-- | The default minimum ispec. |
178 |
defMinISpec :: ISpec |
179 |
defMinISpec = ISpec { iSpecMemorySize = C.ispecsMinmaxDefaultsMinMemorySize |
180 |
, iSpecCpuCount = C.ispecsMinmaxDefaultsMinCpuCount |
181 |
, iSpecDiskSize = C.ispecsMinmaxDefaultsMinDiskSize |
182 |
, iSpecDiskCount = C.ispecsMinmaxDefaultsMinDiskCount |
183 |
, iSpecNicCount = C.ispecsMinmaxDefaultsMinNicCount |
184 |
, iSpecSpindleUse = C.ispecsMinmaxDefaultsMinSpindleUse |
185 |
} |
186 |
|
187 |
-- | The default standard ispec. |
188 |
defStdISpec :: ISpec |
189 |
defStdISpec = ISpec { iSpecMemorySize = C.ipolicyDefaultsStdMemorySize |
190 |
, iSpecCpuCount = C.ipolicyDefaultsStdCpuCount |
191 |
, iSpecDiskSize = C.ipolicyDefaultsStdDiskSize |
192 |
, iSpecDiskCount = C.ipolicyDefaultsStdDiskCount |
193 |
, iSpecNicCount = C.ipolicyDefaultsStdNicCount |
194 |
, iSpecSpindleUse = C.ipolicyDefaultsStdSpindleUse |
195 |
} |
196 |
|
197 |
-- | The default max ispec. |
198 |
defMaxISpec :: ISpec |
199 |
defMaxISpec = ISpec { iSpecMemorySize = C.ispecsMinmaxDefaultsMaxMemorySize |
200 |
, iSpecCpuCount = C.ispecsMinmaxDefaultsMaxCpuCount |
201 |
, iSpecDiskSize = C.ispecsMinmaxDefaultsMaxDiskSize |
202 |
, iSpecDiskCount = C.ispecsMinmaxDefaultsMaxDiskCount |
203 |
, iSpecNicCount = C.ispecsMinmaxDefaultsMaxNicCount |
204 |
, iSpecSpindleUse = C.ispecsMinmaxDefaultsMaxSpindleUse |
205 |
} |
206 |
|
207 |
-- | Minimum and maximum instance specs type. |
208 |
$(THH.buildObject "MinMaxISpecs" "minMaxISpecs" |
209 |
[ THH.renameField "MinSpec" $ THH.simpleField "min" [t| ISpec |] |
210 |
, THH.renameField "MaxSpec" $ THH.simpleField "max" [t| ISpec |] |
211 |
]) |
212 |
|
213 |
-- | Defult minimum and maximum instance specs. |
214 |
defMinMaxISpecs :: [MinMaxISpecs] |
215 |
defMinMaxISpecs = [MinMaxISpecs { minMaxISpecsMinSpec = defMinISpec |
216 |
, minMaxISpecsMaxSpec = defMaxISpec |
217 |
}] |
218 |
|
219 |
-- | Instance policy type. |
220 |
$(THH.buildObject "IPolicy" "iPolicy" |
221 |
[ THH.renameField "MinMaxISpecs" $ |
222 |
THH.simpleField C.ispecsMinmax [t| [MinMaxISpecs] |] |
223 |
, THH.renameField "StdSpec" $ THH.simpleField C.ispecsStd [t| ISpec |] |
224 |
, THH.renameField "DiskTemplates" $ |
225 |
THH.simpleField C.ipolicyDts [t| [DiskTemplate] |] |
226 |
, THH.renameField "VcpuRatio" $ |
227 |
THH.simpleField C.ipolicyVcpuRatio [t| Double |] |
228 |
, THH.renameField "SpindleRatio" $ |
229 |
THH.simpleField C.ipolicySpindleRatio [t| Double |] |
230 |
]) |
231 |
|
232 |
-- | Converts an ISpec type to a RSpec one. |
233 |
rspecFromISpec :: ISpec -> RSpec |
234 |
rspecFromISpec ispec = RSpec { rspecCpu = iSpecCpuCount ispec |
235 |
, rspecMem = iSpecMemorySize ispec |
236 |
, rspecDsk = iSpecDiskSize ispec |
237 |
, rspecSpn = iSpecSpindleUse ispec |
238 |
} |
239 |
|
240 |
-- | The default instance policy. |
241 |
defIPolicy :: IPolicy |
242 |
defIPolicy = IPolicy { iPolicyMinMaxISpecs = defMinMaxISpecs |
243 |
, iPolicyStdSpec = defStdISpec |
244 |
-- hardcoding here since Constants.hs exports the |
245 |
-- string values, not the actual type; and in |
246 |
-- htools, we are mostly looking at DRBD |
247 |
, iPolicyDiskTemplates = [minBound..maxBound] |
248 |
, iPolicyVcpuRatio = C.ipolicyDefaultsVcpuRatio |
249 |
, iPolicySpindleRatio = C.ipolicyDefaultsSpindleRatio |
250 |
} |
251 |
|
252 |
-- | The dynamic resource specs of a machine (i.e. load or load |
253 |
-- capacity, as opposed to size). |
254 |
data DynUtil = DynUtil |
255 |
{ cpuWeight :: Weight -- ^ Standardised CPU usage |
256 |
, memWeight :: Weight -- ^ Standardised memory load |
257 |
, dskWeight :: Weight -- ^ Standardised disk I\/O usage |
258 |
, netWeight :: Weight -- ^ Standardised network usage |
259 |
} deriving (Show, Eq) |
260 |
|
261 |
-- | Initial empty utilisation. |
262 |
zeroUtil :: DynUtil |
263 |
zeroUtil = DynUtil { cpuWeight = 0, memWeight = 0 |
264 |
, dskWeight = 0, netWeight = 0 } |
265 |
|
266 |
-- | Base utilisation (used when no actual utilisation data is |
267 |
-- supplied). |
268 |
baseUtil :: DynUtil |
269 |
baseUtil = DynUtil { cpuWeight = 1, memWeight = 1 |
270 |
, dskWeight = 1, netWeight = 1 } |
271 |
|
272 |
-- | Sum two utilisation records. |
273 |
addUtil :: DynUtil -> DynUtil -> DynUtil |
274 |
addUtil (DynUtil a1 a2 a3 a4) (DynUtil b1 b2 b3 b4) = |
275 |
DynUtil (a1+b1) (a2+b2) (a3+b3) (a4+b4) |
276 |
|
277 |
-- | Substracts one utilisation record from another. |
278 |
subUtil :: DynUtil -> DynUtil -> DynUtil |
279 |
subUtil (DynUtil a1 a2 a3 a4) (DynUtil b1 b2 b3 b4) = |
280 |
DynUtil (a1-b1) (a2-b2) (a3-b3) (a4-b4) |
281 |
|
282 |
-- | The description of an instance placement. It contains the |
283 |
-- instance index, the new primary and secondary node, the move being |
284 |
-- performed and the score of the cluster after the move. |
285 |
type Placement = (Idx, Ndx, Ndx, IMove, Score) |
286 |
|
287 |
-- | An instance move definition. |
288 |
data IMove = Failover -- ^ Failover the instance (f) |
289 |
| FailoverToAny Ndx -- ^ Failover to a random node |
290 |
-- (fa:np), for shared storage |
291 |
| ReplacePrimary Ndx -- ^ Replace primary (f, r:np, f) |
292 |
| ReplaceSecondary Ndx -- ^ Replace secondary (r:ns) |
293 |
| ReplaceAndFailover Ndx -- ^ Replace secondary, failover (r:np, f) |
294 |
| FailoverAndReplace Ndx -- ^ Failover, replace secondary (f, r:ns) |
295 |
deriving (Show) |
296 |
|
297 |
-- | Formatted solution output for one move (involved nodes and |
298 |
-- commands. |
299 |
type MoveJob = ([Ndx], Idx, IMove, [String]) |
300 |
|
301 |
-- | Unknown field in table output. |
302 |
unknownField :: String |
303 |
unknownField = "<unknown field>" |
304 |
|
305 |
-- | A list of command elements. |
306 |
type JobSet = [MoveJob] |
307 |
|
308 |
-- | Default max disk usage ratio. |
309 |
defReservedDiskRatio :: Double |
310 |
defReservedDiskRatio = 0 |
311 |
|
312 |
-- | Base memory unit. |
313 |
unitMem :: Int |
314 |
unitMem = 64 |
315 |
|
316 |
-- | Base disk unit. |
317 |
unitDsk :: Int |
318 |
unitDsk = 256 |
319 |
|
320 |
-- | Base vcpus unit. |
321 |
unitCpu :: Int |
322 |
unitCpu = 1 |
323 |
|
324 |
-- | Base spindles unit. |
325 |
unitSpindle :: Int |
326 |
unitSpindle = 1 |
327 |
|
328 |
-- | Reason for an operation's falure. |
329 |
data FailMode = FailMem -- ^ Failed due to not enough RAM |
330 |
| FailDisk -- ^ Failed due to not enough disk |
331 |
| FailCPU -- ^ Failed due to not enough CPU capacity |
332 |
| FailN1 -- ^ Failed due to not passing N1 checks |
333 |
| FailTags -- ^ Failed due to tag exclusion |
334 |
| FailDiskCount -- ^ Failed due to wrong number of disks |
335 |
| FailSpindles -- ^ Failed due to wrong/missing spindles |
336 |
| FailInternal -- ^ Internal error |
337 |
deriving (Eq, Enum, Bounded, Show) |
338 |
|
339 |
-- | List with failure statistics. |
340 |
type FailStats = [(FailMode, Int)] |
341 |
|
342 |
-- | Either-like data-type customized for our failure modes. |
343 |
-- |
344 |
-- The failure values for this monad track the specific allocation |
345 |
-- failures, so this is not a general error-monad (compare with the |
346 |
-- 'Result' data type). One downside is that this type cannot encode a |
347 |
-- generic failure mode, hence our way to build a FailMode from string |
348 |
-- will instead raise an exception. |
349 |
type OpResult = GenericResult FailMode |
350 |
|
351 |
-- | 'FromString' instance for 'FailMode' designed to catch unintended |
352 |
-- use as a general monad. |
353 |
instance FromString FailMode where |
354 |
mkFromString v = error $ "Programming error: OpResult used as generic monad" |
355 |
++ v |
356 |
|
357 |
-- | Conversion from 'OpResult' to 'Result'. |
358 |
opToResult :: OpResult a -> Result a |
359 |
opToResult (Bad f) = Bad $ show f |
360 |
opToResult (Ok v) = Ok v |
361 |
|
362 |
-- | A generic class for items that have updateable names and indices. |
363 |
class Element a where |
364 |
-- | Returns the name of the element |
365 |
nameOf :: a -> String |
366 |
-- | Returns all the known names of the element |
367 |
allNames :: a -> [String] |
368 |
-- | Returns the index of the element |
369 |
idxOf :: a -> Int |
370 |
-- | Updates the alias of the element |
371 |
setAlias :: a -> String -> a |
372 |
-- | Compute the alias by stripping a given suffix (domain) from |
373 |
-- the name |
374 |
computeAlias :: String -> a -> a |
375 |
computeAlias dom e = setAlias e alias |
376 |
where alias = take (length name - length dom) name |
377 |
name = nameOf e |
378 |
-- | Updates the index of the element |
379 |
setIdx :: a -> Int -> a |
380 |
|
381 |
-- | The iallocator node-evacuate evac_mode type. |
382 |
$(THH.declareSADT "EvacMode" |
383 |
[ ("ChangePrimary", 'C.iallocatorNevacPri) |
384 |
, ("ChangeSecondary", 'C.iallocatorNevacSec) |
385 |
, ("ChangeAll", 'C.iallocatorNevacAll) |
386 |
]) |
387 |
$(THH.makeJSONInstance ''EvacMode) |
388 |
|
389 |
-- | The repair modes for the auto-repair tool. |
390 |
$(THH.declareSADT "AutoRepairType" |
391 |
-- Order is important here: from least destructive to most. |
392 |
[ ("ArFixStorage", 'C.autoRepairFixStorage) |
393 |
, ("ArMigrate", 'C.autoRepairMigrate) |
394 |
, ("ArFailover", 'C.autoRepairFailover) |
395 |
, ("ArReinstall", 'C.autoRepairReinstall) |
396 |
]) |
397 |
|
398 |
-- | The possible auto-repair results. |
399 |
$(THH.declareSADT "AutoRepairResult" |
400 |
-- Order is important here: higher results take precedence when an object |
401 |
-- has several result annotations attached. |
402 |
[ ("ArEnoperm", 'C.autoRepairEnoperm) |
403 |
, ("ArSuccess", 'C.autoRepairSuccess) |
404 |
, ("ArFailure", 'C.autoRepairFailure) |
405 |
]) |
406 |
|
407 |
-- | The possible auto-repair policy for a given instance. |
408 |
data AutoRepairPolicy |
409 |
= ArEnabled AutoRepairType -- ^ Auto-repair explicitly enabled |
410 |
| ArSuspended AutoRepairSuspendTime -- ^ Suspended temporarily, or forever |
411 |
| ArNotEnabled -- ^ Auto-repair not explicitly enabled |
412 |
deriving (Eq, Show) |
413 |
|
414 |
-- | The suspend timeout for 'ArSuspended'. |
415 |
data AutoRepairSuspendTime = Forever -- ^ Permanently suspended |
416 |
| Until ClockTime -- ^ Suspended up to a certain time |
417 |
deriving (Eq, Show) |
418 |
|
419 |
-- | The possible auto-repair states for any given instance. |
420 |
data AutoRepairStatus |
421 |
= ArHealthy (Maybe AutoRepairData) -- ^ No problems detected with the instance |
422 |
| ArNeedsRepair AutoRepairData -- ^ Instance has problems, no action taken |
423 |
| ArPendingRepair AutoRepairData -- ^ Repair jobs ongoing for the instance |
424 |
| ArFailedRepair AutoRepairData -- ^ Some repair jobs for the instance failed |
425 |
deriving (Eq, Show) |
426 |
|
427 |
-- | The data accompanying a repair operation (future, pending, or failed). |
428 |
data AutoRepairData = AutoRepairData { arType :: AutoRepairType |
429 |
, arUuid :: String |
430 |
, arTime :: ClockTime |
431 |
, arJobs :: [JobId] |
432 |
, arResult :: Maybe AutoRepairResult |
433 |
, arTag :: String |
434 |
} |
435 |
deriving (Eq, Show) |